Ti-15-3合金经冷轧和时效后的显微组织及力学性能  

Microstructure and Mechanical Properties of Ti-15-3 Alloy after Cold Rolling and Aging Treatment

作　　者：郭强[1] 王清[1] 韩秀丽[1] 孙东立[1] 武高辉[1] 孙涛[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,哈尔滨150001

出　　处：《机械工程材料》2010年第4期14-17,21,共5页Materials For Mechanical Engineering

摘　　要：利用光学显微镜、透射电镜和X射线衍射仪等研究了Ti-15-3合金在五种不同工艺轧制过程中组织的演变规律以及轧制和时效处理后的显微组织和力学性能。结果表明:采用三种单向冷轧工艺均可以将2.9 mm厚的合金板很好地轧制成厚度约为0.6 mm的板材,并且轧后其晶粒逐步细化到纳米尺度,最小尺寸达到19.1 nm;固溶态合金经过40%/道次-3道次的冷轧并于450℃时效4 h后,由于出现了双相纳米组织,使合金的抗拉强度达到1 562 MPa,比冷轧态的提高了45%。The Microstructure evolution during cold rolling with five processes of Ti-15-3 alloy and the microstructure and mechenical properties after rolling and aging treatment were investigated by using optical microscopy,transmission electron microscopy and X ray diffraction.The results show that 0.6 mm sheet could be obtained after rolling the sheet with thickness of 2.9 mm through three different cold rolling processes in unidirection.The grain size was refined to nanoscale with a minimum size of 19.1 nm.After 40%/pass-3 passes cold rolling and aging at 450℃for 4 h,bidirectional nano-structure in the solution treated alloy was found which improved the ultimate strength of the alloy to 1 562 MPa,that was increased by 45%compared with the cold-rolled alloy.

关 键 词：TI-15-3合金 冷轧工艺 纳米晶粒 抗拉强度 

分 类 号：TG146.4[一般工业技术—材料科学与工程]